You make it sound like Street racing is a controlled event and that only the people that are there willingly are at risk. This sounds like bullshit to me, alot of the guys that street race are pretty retarded, you just have to browse the forums they frequent to get a taste for their brand of safe.
A "safe" street racing event that didn't endanger unwilling participants is something hard to imagine. I'm sure you can reduce the risk but still people are being endangered that aren't up for it.